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UIUC NRES 201 Exam 2 Review, NRES 201 Topic 1 uiuc Curriculum Revision Compilation.
How does the hydrometer method determine soil texture? - ANSWER Sedimentation by the hydrometer method determines the percentages of sand, silt, and clay. Sand settles first, then silt -Clay is estimated by the difference. 
 
 How do bulk and particle densities differ? - ANSWER Particle density does not include volume between particles and is unaffected by soil structure, pore space, compaction, and tillage. 
 
 How does bulk density affect root growth? - ANSWER High bulk density impedes root...